Capsicum annuum L.) genotypes for waterlogging tolerance at seedling stage">Screening and evaluation of chilli ( Capsicum annuum L.) genotypes for waterlogging tolerance at seedling stage

Biocell

article

REZWAN MOLLA¹  MOTIAR ROHMAN²  ROBYUL ISLAM¹  MIRZA HASANUZZAMAN⁴  LUTFUL HASSAN³ 

[1]Plant Genetic Resources Centre ,(PGRC), Bangladesh Agricultural Research Institute

[2]Molecular Breeding Lab, Plant Breeding Division, Bangladesh Agricultural Research Institute

[3]Department of Genetics and Plant Breeding, Bangladesh Agricultural University

[4]Department of Agronomy, Sher-e-Bangla Agricultural University

关键词: Abiotic stress;    Anoxia;    Flooding;    Hypoxia;    Pepper;    Photosynthetic pigments;    Proline;   

DOI  :  10.32604/biocell.2022.019243

学科分类：仪器

来源: Biocell

【 摘 要 】

Waterlogging is an illustrious abiotic stress and the constrictions it enforces on plant roots have negative effectson growth and development. This study was undertaken to investigate waterlogging stress tolerant potential in chilli(Capsicum annum L.) genotypes through evaluating morphological, physiological, biochemical and anatomicalparameters. Thirty-five days old seedlings of 10 chilli genotypes were exposed to waterlogging stress maintainingwater height 3–5 cm over the soil surface artificially for three days. This duration (36–38 DAE) was termed aswaterlogging period, and subsequent withdrawal of waterlogging condition (39–45 DAE) was regarded as a recoveryphase. Based on their survival performance, two tolerant genotypes viz., SRC-517 and BARI morich-2 and twosusceptible genotypes viz., AHM-206 and RI-1(6) were selected for studying stress tolerance mechanism. Underwaterlogging, however, both genotypes (tolerant and susceptible) exhibited reduced root shoot length, dry weightratio, petiole weight and leaf area, and noticeable reduction regarding these parameters was observed in susceptiblegenotypes. Moreover, tolerant genotypes displayed a higher recovery than susceptible genotypes after removal ofwaterlogging stress. Lower reduction of leaf area and photosynthetic pigments as well as higher reduction of relativewater content (RWC) were noticed in susceptible genotypes. Higher accumulation of proline and total antioxidantcapacity (TAC) during waterlogging condition in tolerant genotypes suggested lower oxidative damage. Although bothgenotypes lost total soluble sugar (TSS) relative to control at waterlogging stress, better performance was recorded intolerant genotypes. During the period after the removal of extra water, a similar genotypic response in terms of TSSgain was seen. Undoubtedly, under flooding conditions, the development of aerenchyma cells in tolerant genotypes isa means of tolerance mechanism for long-term survival. Thus, the morpho-physiological and biochemical changeshelp to understand the tolerance mechanism in chilli under waterlogging stress.

【 授权许可】

CC BY